SF Block Mounts 217x148mm double seal, black backing film

Block mounts offer maximum protection against sticking, discolouration, dust and humidity.
Stamps held securely in place by strong clamp – type seal.
SF mounts are made from 100% polystyrene (free from softening agents, acids and stabilising chemicals).
Antireflection coating prevents light interference.
Special adhesive on reverse side of film (simply moisten and stick down!).
Pack of 6.
d = double seal (closed top and bottom)

Size 217 x 148mm Double Seal

pack of 6