3M integrated 1:1 & 2:1 plunger for EPX Plus II Dispensers (PLA-050-01 ) This single plunger works with both 1:1 and 2:1 ratio Dual-Barrel 50ml, 47ml & 48.5ml cartridges. In the past, you needed two plungers, with this you need only one plunger for these most common sizes. Specifications *Brand: 3M (by MixPac) *Trade Name: 3M EPX Applicator series *MixPac (producer) Number: PLA-050-01