Bacterial Endotoxin test for Devices

What is the endotoxin limit for Medical devices/ Rubber Bungs and what is the reference for that?
Can anybody tell me the procedure for testing the medical devices/ Rubber bungs for Bacterial Endotoxin test?

We have dicussed this in GMP section. The limit is same as water for injection. This is a primary contact part and primary packing material. The regulations are very stringent.
Testing procedures are available in USP and BP.

can you please provide the monograph or chapter number for tht.