for Fiberglass Projects: Fiberglass roller choice for getting air bubbles out of freshly laid fiberglass resin helpful items for getting a smooth finish improvement project. Material: Adopt of aluminum alloy materials and machining, a precise balance of glass and resin with pockets, durable and sturdy . : Used for removing air bubbles from lamination, leveling and compaction of resin coating to drive bubbles, just never know something other than the designed purpose to save . Specification: Colour: black and silver Material: aluminum alloy and plastic Size Chart: Size: 50x13mm stepped corner roller, 20x75mm, 10x50mm and 12.5x125mm straight-grain roller, 25x50mm arc roller Package Includes: Note: Light shooting and different displays may cause little different from thing. The measurement allowed error is 1-3cm.