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.High Quality 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 + silverMaterial: aluminum alloy + plasticSize Chart:Size: 50x13mm stepped corner roller, 20x75mm, 10x50mm and 12.5x125mm straight-grain roller, 25x50mm arc rollerPackage Includes:Note:Light shooting and different displays may cause little different from thing. The measurement allowed error is +/- 1-3cm.