tougher than ABS, comes in bright translucent colors, and is not paintable. Hobbies: radio-controlled helicopter main gear, landing skid, yo-yos, vaping drip tips, 3D printer wheels, K'Nex, ball-jointed dolls, etc. Medical: insulin pen, metered dose inhalers (MDI). Food industry: Food and Drug Administration has approved some grades of POM for milk pumps, coffee spigots, filter housings and food conveyors. Furniture: hardware, locks, handles, hinges., rollers for sliding mechanisms of furnitures Construction: structural glass - pod holder for point Packaging: aerosol cans, vehicle tanks. Pens: used as the material for pen bodies and caps Sports: paintball accessories. It is often used for machined parts of paintball markers that do not require the strength of aluminium, such as handles and reciprocating bolts. POM is also used in airsoft guns to reduce piston noise. Longboarding: puck material for slide gloves help the rider touch the road and lean on their hand to slow down, stop, or perform tricks. Clothing: zippers. Music: picks, Irish flutes, bagpipes, practice chanters, harpsichord plectra, instrument mouthpieces, tips of some drum sticks. Dining: fully automatic coffee brewers; knife handles (particularly folding knives). Horology: mechanical movement parts (e.g. Lemania 5100), watch bracelets (e.g. IWC Porsche Design 3701). Vapor/e-cigarette accessories: material used in the manufacturing of most "Drip Tips" (Mouthpiece). Tobacco products: The BIC Group uses Delrin for their lighters. Keyboard keycaps: Cherry uses POM for their G80 and G81 series keyboards. Degradation Acetal resins are sensitive to acid hydrolysis and oxidation by agents such as mineral acid and chlorine. POM homopolymer is also susceptible to alkaline attack and is more susceptible to degradation in hot water. Thus low levels of chlorine in potable water supplies (1–3 ppm) can be sufficient to cause environmental stress cracking, a problem experienced in both the US and Europe in domestic and commercial water supply systems. Defective mouldings are most sensitive to cracking, but normal mouldings can succumb if the water is hot. Both POM homopolymer and copolymer are stabilized to mitigate these types of degradation. In chemistry applications, although the polymer is often suitable for the majority of glassware work, it can succumb to catastrophic failure. An example of this would be using the polymer clips on hot areas of the glassware (such as a flask-to-column, column-to-head or head-to-condenser joint during distillation). As the polymer is sensitive to both chlorine and acid hydrolysis, it may perform very poorly when exposed to the reactive gases,