VARI-STEM -- Size Chart

Size Chart

Size Chart

Part #

Borehole Sizes (in)

Sizes (mm)

Pieces / Box

Box Weight*

BP-2

2" - 1 5/8"

51 - 40 mm

210

42 lbs [19.1 kg]

BP-2.5

2 ½" - 2 1/16"

64 - 52 mm

144

38 lbs [17.2 kg]

BP-3

3" - 2 9/16"

76 - 65 mm

160

45 lbs [20.4 kg]

BP-3.5

3 ½" - 3 1/16"

89 - 77 mm

96

32 lbs [14.5 kg]

BP-4

4" - 3 9/16"

101 - 90 mm

84

35 lbs [15.9 kg]

BP-4.5

4 ½" - 4 ¼"

114 - 100 mm

84

38 lbs [17.2 kg]

BP-5

5" - 4 ¾"

127 - 115 mm

48

28 lbs [12.7 kg]

BP-5.5

5 ½" - 5 ¼"

140 - 128 mm

48

29 lbs [13.2 kg]

BP-6

6" - 5 ¾"

152 - 141 mm

30

26 lbs [11.8 kg]

BP-6.5

6 ½" - 6 ¼"

165 - 153 mm

21

22 lbs [10.0 kg]

BP-7

7" - 6 ¾"

177 - 166 mm

18

25 lbs [11.3 kg]


* All box weights are approximate due to variations in wall thickness and length.


Available sizes of stemming plugs
We have partial tooling for smaller and larger sizes. Please contact us for information about these additional sizes.


VARI-STEM -- Size Chart

This size chart is only a guide. In many cases, undersized plugs prove effective, especially in cold weather. In cold weather the plugs do stiffen up. We recommend trying to keep the plugs in a warm environment (i.e., truck cab) prior to use, in order to keep them flexible. We can provide a low temperature formula, if needed.


Samples can be provided for hole size testing. (See our Sample Policy)