Dear Parichat,
Thanks for your email.
Sorry for the misunderstanding of the Fixed Attenuator, these two type Attenuator (adapter type figure 1 and plug-in type figure 2),we both called Fixed Attenuator,if customer do not indicate the detail requirement,we all defined as Fixed attenuator as adapter type attenuator. Also this two type have big price difference:
1.Adapter type attenuator (figure 1) usd 0.78/pcs
2.Plug-in type attenuator (figure 2) usd 3.30/pcs
For this 50 pcs adapter type attenuator we have sent you in this order by mistake,pls keep it,do not need to send back. For your required the Plug-in type attenuator ,we will send you in your next order,but you slould pay the price difference,for usd 2.52/pcs.
Awaiting for your prompt reply.