1. Green Vein Maeng Da 38.4g Blister, 64 Caps Kratom2. Green Vein Maeng Da 19.2g Blister, 32 Caps Kratom 3. Green Vein Maeng Da 9.6g Blister, 16 Caps The Silver O.P.M.S. box is alternative packaging to the Silver O.P.M.S. in the Bag. O.P.M.S. Silver in the Box is available in 9.6g, 19.2g, and 38.4g. The O.P.M.S. Silver box contains many authentication signatures. On the front of the box is a window to view the contents inside. Inside the box are O.P.M.S. Silver Capsules in a blister pack. The blister pack has the O.P.M.S. logo molded in the front. The logo is also printed on the back of the blister card along with a lot number and serial number on each blister pack. The O.P.M.S. capsules with the O.P.M.S. logos are also visible in the blister pack.